Embodiment herein provides loose and extrusion a popcorn product synthesized from oatmeal. Popcorn product is similar appearance, quality and the taste of the puffed rice of the rule. One oatmeal mixing water is to obtain a kind of mixture. Oatmeal is cooked under high moderate pressure. Oatmeal is passed to the die holes that the end of extruder is mounted on by hammer type twins extruding screw. Corn is squeezed out in the hole of a high speed to obtain a corn product of irregular shape. Enter several pieces of required length by the corn product of a cutter. Cut piece uses a drying machine dry before encapsulation.